It is recommended that the WLTS be installed in a vertical orientation. However, inclined or horizontal installation is acceptable. The pressure sensor measurement line (zero point) is indicated by the machined line around the sensor body.
The pressure transducer is oriented in a plane normal to the long axis of the body, and detects pressure directed along the plane of the long axis. In vertical orientations, the sensor detects pressure above the pressure transducer line. In non-vertical orientations, the pressure zero point is proportional to the angle of inclination.
Before Deployment, make sure you do the following:
- Program your WLTS, using the WLTS Utility, with the correct settings
- Determine deployment depth to ensure the WLTS does not touch the bottom of a tank, well, etc. (avoid submergence in sediment).
- Determine the minimum and maximum expected water levels, as the WLTS must remain submerged for the entire monitoring period, without over-ranging the pressure sensor.
- Use a Solinst Model 101 or 102 Water Level Meter to take a manual depth to water measurement that will be used to verify WLTS readings.
Note:
The WLTS can withstand over-pressurization of 2 times the intended range, e.g. a Model M10 can accommodate a fluctuation of 20 meters or 60 feet and still record pressure. However, over-range accuracy is not guaranteed.
Note:
The length of the Communication/Vented Cable should not be assumed as the deployment depth, as there may be some slack in the cable.
Note:
It is recommended to take a manual water level measurement before installing a WLTS, shortly after installation, periodically during your monitoring interval, and at the end of your measurement period. Use these measurements to verify WLTS readings, and for data adjustments later on. Ensure you take manual readings as close in time as possible to a scheduled WLTS reading.
Figure 3-2 Water Level Temperature Sensor Dimensions
Deployment
- The WLTS is designed to be conveniently installed in a number of applications, as long as proper precautions and recommendations are followed.
- The nose cone of the Sensor can be removed to make use of the 1/4" NPTM threaded connection.
- Do not drop the WLTS into the water, carefully lower it into place. Avoid installing in areas where "water hammer" or hydraulic jump" (very sudden, large increases in pressure) may occur.
- Be careful not to nick or bend the Vented Cable during installation (use a maximum 1" (25 mm) bend radius as a precaution).
After Deployment, make sure you do the following:
- Take a manual depth to water measurement after the WLTS has stabilized (approximately 10 minutes).
- Take another manual depth to water measurement just before removing the WLTS.
